<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        h2 {
            font-family:"微软雅黑","宋体","仿宋","黑体";
        }
    </style>
</head>
<body>
<div>这是一段文字</div>
<div style="font-size: 16px">这是一段文字</div>
</body>
</html>